If anyone else was curious, their sample OSM derived PMTile file (protomaps-basemap-opensource-20230408.pmtiles) is 103GB. https://docs.protomaps.com/basemaps/downloads
Exactly the kind of thing that could be downloaded using Bittorrent!
Protomaps – A free and open source map of the world
81–90 of 169 posts
Re: Protomaps – A free and open source map of the world
#82I just used their pmtiles tool to grab a map of just the area around Half Moon Bay, south of San Francisco.
I grabbed the latest macOS Go binary from https://github.com/protomaps/go-pmtiles/releases
I found a rough bounding box using http://bboxfinder.com/#37.373977,-122.593346,37.570977,-122....
Then I ran this:
pmtiles extract https://build.protomaps.com/20231023.pmtiles hmb.pmtiles \
--bbox=-122.593346,37.373977,-122.400055,37.570977
All that in 2MB! I'm really impressed.
My file is here: https://gist.githubusercontent.com/simonw/3c1a5358ca8f782f13...
Re: Protomaps – A free and open source map of the world
#83If anyone else was curious, their sample OSM derived PMTile file (protomaps-basemap-opensource-20230408.pmtiles) is 103GB. https://docs.protomaps.com/basemaps/downloads
Yes thank you I was wondering exactly this. Quite reasonable size one might say.
Re: Protomaps – A free and open source map of the world
#84For me the most interesting part is “PMTiles”: > PMTiles is a single-file archive format for pyramids of tiled data. A PMTiles archive can be hosted on a storage platform like S3, and enables low-cost, zero-maintenance map applications. > PMTiles is a general format for tiled data addressed by Z/X/Y coordinates. This can be cartographic basemap vector tiles, remote sensing observations, JPEG images, or more. > PMTile…
These being vector files, does it mean they can be styled on the fly?
Re: Protomaps – A free and open source map of the world
#85Usually .com domains were used by commercial entities, and protomaps.com seems like it might have cost some money. I don't fully understand LLC except that they protect owners from company liability. Just trying to figure out what the goal for this company is.
I'm the owner of said commercial company. LLCs in this context signal "This company has no outside investors", because almost every venture-backed technology company will be organized as a C Corporation instead. I am choosing to run this open source project through a commercial company - that enables me to have a bank account, use GitHub Sponsors, pay others for work, and enter in support and development contracts wi…
Why not an SPC?
Re: Protomaps – A free and open source map of the world
#86Earlier quoted context omitted.
Pmtiles are the vector counterpart to Cloud Optimized GEOTIFF (COG), allowing for efficient usage of mapping info from clients when the server supports a http range request. Previous iterations of this on the vector side have either been a ton of small files(pbf) or a large file that needed a front end to serve the individual tiles (mbtiles). At this point, you can take an OSM dump and convert it to a country level b…
pmtiles are only the counterpart to the "overviews" part of COG. pmtiles doesn't give you analysis-ready data. For that, look to FlatGeobuf or GeoParquet (once it gets a spatial index in v1.1 of the spec)
Yeah, I'm aware of that. I love what you're going with geoparquet, it's certainly quite nice for analysis and some viewing. But there are still going to be a lot of datasets and clients that aren't going to be able to handle that where the tiled approach will work.
I'm looking at this currently for a couple of clients, and I think that for what we're doing -- we're going to wind up serving both a view and analysis version separately.
Re: Protomaps – A free and open source map of the world
#87I lurk in an online community of journalist coders and some folks there are excited about PMTiles as cost-saving way to host your own custom-styled map tiles. See, for instance, "How The Post is replacing Mapbox with open source solutions" https://www.kschaul.com/post/2023/02/16/how-the-post-is-repl...
How do the publications know this data is accurate?
Most of these piggyback on the OSM for the data tier, which $T companies work on. Afaict the discussion is more about compute on top - tile generation, interactive renderers, ... .
Re: Protomaps – A free and open source map of the world
#88Usually .com domains were used by commercial entities, and protomaps.com seems like it might have cost some money. I don't fully understand LLC except that they protect owners from company liability. Just trying to figure out what the goal for this company is.
At the bottom of the frontpage there's a remark on "revenue" A 100% independent software project Protomaps is a self-funded, solo developer project with a mission to make interactive cartography accessible to hobbyists and organizations of all sizes. An essential part of that mission is publishing open source software under commercial-friendly licenses. You can support my full-time work on Protomaps in a few ways: *…
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Re: Protomaps – A free and open source map of the world
#89I just used their pmtiles tool to grab a map of just the area around Half Moon Bay, south of San Francisco. I grabbed the latest macOS Go binary from https://github.com/protomaps/go-pmtiles/releases I found a rough bounding box using http://bboxfinder.com/#37.373977,-122.593346,37.570977,-122.... Then I ran this: pmtiles extract https://build.protomaps.com/20231023.pmtiles hmb.pmtiles \ --bbox=-122.593346,37.373977,-…
That's really cool. Cloud be really use full for local businesses. They often embed Google maps, but I feels like having a map from the local are would be sufficient, and cheaper.
Re: Protomaps – A free and open source map of the world
#90For me the most interesting part is “PMTiles”: > PMTiles is a single-file archive format for pyramids of tiled data. A PMTiles archive can be hosted on a storage platform like S3, and enables low-cost, zero-maintenance map applications. > PMTiles is a general format for tiled data addressed by Z/X/Y coordinates. This can be cartographic basemap vector tiles, remote sensing observations, JPEG images, or more. > PMTile…
These being vector files, does it mean they can be styled on the fly?
(the answer is yes)